Galvanized Steel Specifications

Written by doug leenhouts
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Galvanized Steel Specifications
Galvanised steel is recognisable by the spangling effect. (abblättern image by Ideen from

Galvanised steel is commonly used in many building and outdoors applications. Created by bonding steel with zinc, galvanised steel resists rusting and corrosion. It is identifiable by the spangling effect that appears when steel is dipped in zinc.

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Galvanised cables come in many configurations and sizes; accordingly, their strengths will vary. For example, the breaking strength of 1/16-inch cable in a 7 x 7 array is 218kg., while the breaking strength of 1/32-inch cable in a 3 x 7 array is 49.9kg.


The density of galvanised steel varies, but according to, it is in the vicinity of 7.7g per cc. The density of stainless steel is slightly higher, at 7.85g per cc; the layer of molten zinc added to galvanised steel slightly reduces that measurement.

Bolts and Screws

When dealing with galvanised steel bolts or screws, concern yourself only with the parts that are not threaded. ASTM Standard A153 states that "in the case of fasteners such as bolts, nuts, and screws, the determination of the weight of the coating shall be made on a portion of the article that does not include threads."

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